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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8S/2225 数据表(PDF) 561 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 561 Page - Renesas Technology Corp |
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561 / 1071 page  Section 13 Watchdog Timer (WDT) Rev. 5.00 Aug 08, 2006 page 475 of 982 REJ09B0054-0500 TCNT value H'00 Time H'FF WT/ IT=0 TME=1 WOVI Overflow Overflow Overflow Overflow Legend: WOVI: Interval timer interrupt request generation WOVI WOVI WOVI Figure 13.3 Interval Timer Mode Operation 13.4.3 Timing of Setting Overflow Flag (OVF) The OVF flag is set to 1 if TCNT overflows during interval timer operation. At the same time, an interval timer interrupt (WOVI) is requested. This timing is shown in figure 13.4. When NMI request is chosen in watchdog timer mode for WDT_1, TCNT overflow sets the OVF flog to 1. At the same time, NMI interrupt is requested. φ TCNT H'FF H'00 OVF Overflow signal (internal signal) Figure 13.4 Timing of OVF Setting |
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